A 3 point starter is a device that helps in the starting and running of a dc shunt motor or compound wound dc motor similar to a 4 point starter. It works on the principle of faradays law of electromagnetic induction.
Dc Shunt Motor Construction Circuit Diagram And Its
Dc shunt motor diagram. Dc series motor components used in dc series motor. Dc shunt motor circuit diagram in case of the shunt wound dc motor this current supply will divide into two ways like ia ish where ia will supply throughout the ra. The field winding is connected in parallel to the armature winding. A dc motor is used to convert the direct current dc electrical power into mechanical power based on the forces produced by magnetic fileds. Since they are connected in parallel the armature and field windings are exposed to the same supply voltagethough there are separate branches for the flow of armature current and field current. In electrical terms parallel is generally denoted as shunt.
Well its due to the presence of back emf e b which plays a critical role in governing the operation of the motor. The dc shunt wound motor running on direct current has its field windings placed in parallel to the armature. This parallel configuration allows independent path of current for field winding and armature. Shunt wound dc motor wiring diagram wiring diagram is a simplified standard pictorial representation of an electrical circuitit shows the components of the circuit as simplified shapes and the facility and signal contacts together with the devices. That is the reason behind naming it a dc shunt motor. The dc shunt motor circuit diagram is shown below and the flow of current and voltage being supplied to the motor from the supply can be given by itotal e.
The circuit diagram that represents the shunt type motor is shown in the figure below. A dc shunt motor also known as a shunt wound dc motor is a type of self excited dc motor where the field windings are shunted to or are connected in parallel to the armature winding of the motor. The output of the motor is mechanical power in terms of rotation speed of the shaft. The motor can be connected in two arrangements. The self excited motors are further classified as shunt wound or shunt motor series wound or series motor and compound wound or compound motor. This motor is used when both a high starting torque and good speed regulation is needed.
A dc supply is applied to the field winding across the armature. The components of this motor mainly include the rotor the armature commutator stator axle field windings and brushesthe fixed component of the motor is the stator and it is built with two otherwise more electromagnet pole parts. Now the question is why these types of dc motors require the assistance of the starter in the first place. Same voltage is applied to both shunt winding and armature in this motor. Types of dc motor a direct current motor dc is named according to the connection of the field winding with the armaturemainly there are two types of dc motors. Dc shunt motor diagram.
Speed control methods of dc motor voltage rheostatic flux control of series shunt dc motors. First one is separately excited dc motor and self excited dc motor. A compound dc motor connects the armature and fields windings in a shunt and a series combination to give it characteristics of both a shunt and a series dc motor.
Gallery of Dc Shunt Motor Diagram
